[2808] in Kerberos
weird sim_server behavior
daemon@ATHENA.MIT.EDU (Jim Miller)
Fri Sep 10 19:26:55 1993
From: jim@bilbo.suite.com (Jim Miller)
Date: Fri, 10 Sep 93 17:57:03 -0500
To: kerberos@MIT.EDU
Reply-To: Jim_Miller@suite.com
I'm doing some testing of Kerberos 5, Pre-Beta3 on a NEXTSTEP machine and I'm
seeing some undesireable behavior with the sim_server application. I was
wonder if anyone else has seen similar behavior on any other platform or any
other release of Kerberos 5.
Here is what I'm seeing:
The application sim_server sometimes fails with the following message:
Received 424 bytes
Got authentication info from jim@NIMROD.SUITE.COM
Received 131 bytes
Safe message is: '1234'
Received 132 bytes
sim_server: isode (ps):End of file while verifying PRIV message <---********
Sim_server will work or fail depending on the size of the message. For
example, in the previous test, the size of the message was 4 bytes. Here is a
chart of the message sizes that I've found to work and/or fail:
msg size | success | failure | bytes received
------------|-----------|-----------|-------------
1 x 123
2 x 132
3 x 132
4 x 132
5 x 132
6 x 132
7 x 132
8 x 132
9 x 132
10 x 141
11 x 141
12 x 141
13 x 141
14 x 141
15 x 141
16 x 141
17 x 141
18 x 151
19 x 151
20 x 151
21 x 151
22 x 151
23 x 151
24 x 151
25 x 151
26 x 161
27 x 161
28 x 161
29 x 161
30 x 161
31 x 161
32 x 161
33 x 161
34 x 169
35 x 169
There seems to be a relationship between success/fail and padding the encrypted
message to an 8-octet multiple. It's not an obvious relationship, though.
Any ideas?
Jim_Miller@suite.com
